Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html


Study Counts

Type Study_count
Total_Studies 441
interventional 354
Observational 79
Registry 8

Studies over Time by Start Date

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Interventional Trials

Intervention Type

intervention_type Study_Count
Dietary Supplement 100
Drug 81
Drug|placebo 59
Dietary Supplement|placebo 57
Other 10
Dietary Supplement|Other 9
Drug|Other 8
Behavioral 5
Dietary Supplement|Drug|placebo 3
Dietary Supplement|Radiation 3
Device 2
Diagnostic Test 2
Procedure 2
Behavioral|Dietary Supplement|placebo 1
Behavioral|Other 1
Biological|Other 1
Combination Product|Dietary Supplement|Other 1
Dietary Supplement|Drug 1
Dietary Supplement|Drug|Other|Procedure 1
Dietary Supplement|Other|placebo 1
Dietary Supplement|Other|Procedure 1
Drug|Other|placebo 1
Genetic 1
Other|placebo 1
placebo 1
Radiation 1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Yearly studies for each intervention by start date

Studies by Country

Country Study_Count
United States 148
NA 36
Canada 14
Denmark 10
Israel 9
China 8
Egypt 8
United Kingdom 8
Sweden 7
Austria 6
Turkey 6
France 5
Ireland 5
Jordan 5
Norway 5
Saudi Arabia 5
India 4
Iran, Islamic Republic of 4
Poland 4
Switzerland 4
Brazil 3
Germany 3
Lebanon 3
Mexico 3
Netherlands 3
Bangladesh 2
Chile 2
Finland 2
Indonesia 2
Pakistan 2
Slovenia 2
Spain 2
United Arab Emirates 2
Australia 1
Austria|Belgium 1
Austria|Canada|Chile 1
Brazil|United Kingdom 1
Estonia 1
Ethiopia 1
Germany|United Kingdom 1
Greece 1
Hong Kong 1
Hungary 1
Italy 1
Japan 1
Korea, Republic of 1
Malaysia 1
Mongolia 1
Qatar 1
Russian Federation 1
Singapore 1
Syrian Arab Republic 1
Taiwan 1
Thailand 1
United States|United Arab Emirates 1

Sites per Study

Site_count Study_Count
1 319
2 20
3 6
4 1
5 1
7 1
8 1
9 1
15 1
18 1
20 1
47 1

Phase

Phase Study_Count
N/A 183
Phase 4 65
Phase 3 40
Phase 2 34
Phase 1 17
Phase 2/Phase 3 6
Early Phase 1 5
Phase 1/Phase 2 4

Number of Arms

Number_of_Arms Count_of_Studies
1 40
2 199
3 52
4 42
5 6
6 2
7 1
8 1
10 1
NA 10

Enrollment Metrics by Phase

Measure Early.Phase.1 N.A Phase.1 Phase.1.Phase.2 Phase.2 Phase.2.Phase.3 Phase.3 Phase.4
Min. 16.0 1.0000 10.0000 45.00 5.0000 10.00000 12.000 9.0000
1st Qu. 35.0 42.7500 23.0000 77.25 50.0000 49.50000 61.750 48.0000
Median 68.0 80.0000 55.0000 133.50 73.5000 70.00000 165.000 80.0000
Mean 102.2 171.6044 105.8235 125.75 130.2941 77.16667 305.425 105.8615
3rd Qu. 80.0 130.7500 89.0000 182.00 135.0000 95.00000 350.250 120.0000
Max. 312.0 6000.0000 597.0000 191.00 744.0000 167.00000 2400.000 360.0000

Trial Group Type

group_type Group_Count
Experimental 334
Active Comparator 250
Placebo Comparator 182
No Intervention 41
Other 21
NA 10
Sham Comparator 1

Intervention Model

intervention_model Study_Count
Parallel Assignment 278
Single Group Assignment 57
Crossover Assignment 10
Factorial Assignment 8
Sequential Assignment 1

Primary Purpose

primary_purpose Study_Count
Treatment 203
Prevention 72
Basic Science 26
Supportive Care 11
Health Services Research 10
Other 9
NA 9
Diagnostic 8
Screening 6

Observational Studies

Studies by Country

Country Study_Count
United States 21
NA 11
Turkey 8
Italy 4
Belgium 3
China 3
Israel 3
United Kingdom 3
Egypt 2
Mexico 2
Slovenia 2
Spain 2
Thailand 2
Austria 1
Denmark 1
France 1
Gabon 1
Haiti 1
Hong Kong 1
Korea, Republic of 1
Romania 1
Singapore 1
Sweden 1
Switzerland 1
Taiwan 1
United Arab Emirates 1

Sites per Study

Site_count Study_Count
1 71
2 6
3 2

Enrollment Metrics

Measure Observational
Min 11.000
1st Qu 53.000
Median 138.000
Mean 1604.329
3rd Qu 294.500
Max 39759.000

Observation Model

observational_model Study_Count
Cohort 39
Case-Control 10
Case Control 10
Case-Only 8
Other 5
Ecologic or Community 4
NA 2
Family-Based 1

Time Perspective

time_perspective Study_Count
Prospective 44
Cross-Sectional 26
Retrospective 7
Other 2

Registries

Studies by Country

Country Study_Count
NA 2
Denmark 1
Israel 1
Spain 1
Taiwan 1
Turkey 1
United Kingdom 1

Sites per Study

Site_count Study_Count
1 8

Enrollment Metrics

Measure Registries
Min 50.00
1st Qu 96.00
Median 243.00
Mean 28043.12
3rd Qu 362.25
Max 222776.00

Registry Model

observational_model Study_Count
Cohort 4
Case-Control 1
Case-Only 1
Case Control 1
Ecologic or Community 1

Time Perspective

time_perspective Study_Count
Prospective 6
Cross-Sectional 1
Other 1

Follow-up

target_duration Study_Count
1 Day 2
1 Year 1
12 Years 1
18 Months 1
33 Years 1
6 Months 1
6 Years 1

Overview of Studies

Interventional Trials

#If less then 500 trials

nct_id brief_title link overall_status source primary_completion_date
NCT04461665 Effects of Vitamin D Supplementation on Immune Function in Infants https://ClinicalTrials.gov/show/NCT04461665 Completed Shih Chien University 2016-06-17
NCT03385356 Impact of Vitamin D Supplementation in Patients With Multiple Sclerosis https://ClinicalTrials.gov/show/NCT03385356 Completed University Medical Centre Maribor 2018-04-30
NCT03401541 25-Hydroxyvitamin D Pharmacokinetic Study https://ClinicalTrials.gov/show/NCT03401541 Completed Boston University 2019-04-01
NCT03380091 Metformin, Vitamin D, and Depression in Polycystic Ovary Syndrome (PCOS) Trial https://ClinicalTrials.gov/show/NCT03380091 Recruiting University of California, San Francisco 2021-04-30
NCT03369379 Valuation of Efficacy and Safety of Vitamin D3 Use in 80 Women Diagnosed With Fibromyalgia. Using FIQ Score and VAS. https://ClinicalTrials.gov/show/NCT03369379 Completed Universidad Autonoma de Nuevo Leon 2017-12-31
NCT03342651 Preoperative Vitamin D Levels and Respiratory Complications of General Anesthesia https://ClinicalTrials.gov/show/NCT03342651 Completed T.C. ORDU ÜNİVERSİTESİ 2016-04-01
NCT03339427 Intervention Study of Vitamin D Supplementation to Prevent Cardiovascular Disease https://ClinicalTrials.gov/show/NCT03339427 Completed Chinese PLA General Hospital 2015-01-31
NCT03334136 The Effect of Vitamin D Supplementation on Psoriasis Severity https://ClinicalTrials.gov/show/NCT03334136 Recruiting University Hospital of North Norway 2028-05-28
NCT03333564 Effect of Vitamin D3 and Omega-3FA on Estradiol https://ClinicalTrials.gov/show/NCT03333564 Completed Applied Science Private University 2017-02-28
NCT03318029 Vitamin D Supplementation and Sunlight Exposure in Brazilian Women Living in Opposite Latitudes (The D-SOL Study) https://ClinicalTrials.gov/show/NCT03318029 Completed University of Surrey 2017-09-25
NCT03310307 Vitamin D3 Treatment and Homocysteine Concentrations Among Overweight Reproductive Women https://ClinicalTrials.gov/show/NCT03310307 Completed Al-Balqa Applied University 2016-08-30
NCT03310242 Comparison of Sunlight Exposure and Vitamin D Supplementation on Serum 25-hydroxyvitamin D Levels https://ClinicalTrials.gov/show/NCT03310242 Completed Seoul National University Hospital 2015-11-25
NCT03272126 Importance of Dosing Regimen for the Effect of Vitamin D Supplementation https://ClinicalTrials.gov/show/NCT03272126 Completed University of Tromso 2018-04-01
NCT03258086 Vitamin D in Diabetic Children https://ClinicalTrials.gov/show/NCT03258086 Completed Assiut University 2017-08-31
NCT03232216 Vitamin D Supplementation and Tibia Fracture. Does it Improve Healing Rate? https://ClinicalTrials.gov/show/NCT03232216 Recruiting Hospital del Trabajador de Santiago 2021-08-18
NCT03213886 The Effect of Supplementation of Vitamin D Deficiency in Older People With Acute Hip Fracture: https://ClinicalTrials.gov/show/NCT03213886 Recruiting Consorci Sanitari de Terrassa 2019-04-20
NCT03193944 Vitamin D Supplementation on Metabolic Syndrome Indicators Among Older Adults, Alborz Province, Iran https://ClinicalTrials.gov/show/NCT03193944 Completed Alborz Medical University 2017-05-10
NCT03188796 The VITDALIZE Study: Effect of High-dose Vitamin D3 on 28-day Mortality in Adult Critically Ill Patients https://ClinicalTrials.gov/show/NCT03188796 Recruiting Medical University of Graz 2022-12-31
NCT03176849 A Randomized Phase IV Control Trial of Single High Dose Oral Vitamin D3 in Pediatric Patients Undergoing HSCT https://ClinicalTrials.gov/show/NCT03176849 Enrolling by invitation Phoenix Children’s Hospital 2019-09-01
NCT03151174 Effects of Vitamin D Supplementation on Strength, Bone Density, and Injury Risk in Collegiate Athletes https://ClinicalTrials.gov/show/NCT03151174 Completed Virginia Polytechnic Institute and State University 2018-05-15
NCT03144128 Vitamin D for Muscle Metabolic Function in Cancer Cachexia https://ClinicalTrials.gov/show/NCT03144128 Recruiting University of Kentucky 2021-12-31
NCT03141593 Oral Vitamin D Substitution Weekly or Monthly and Adherence https://ClinicalTrials.gov/show/NCT03141593 Completed University Hospital, Basel, Switzerland 2018-10-31
NCT03134417 Magnesium and Vitamin D Supplementation and Cardiometabolic Outcomes https://ClinicalTrials.gov/show/NCT03134417 Recruiting Drexel University 2019-12-31
NCT03101150 Effect of Vitamin D3 Supplementation in Pregnancy on Risk of Pre-eclampsia https://ClinicalTrials.gov/show/NCT03101150 Completed King Fahad Medical City 2014-10-31
NCT03099759 Vitamin D Raising and Maintaining Blood Serum 25(OH)D3 Levels https://ClinicalTrials.gov/show/NCT03099759 Completed The Cleveland Clinic 2017-05-31
NCT03096314 Vitamin D to Improve Outcomes by Leveraging Early Treatment https://ClinicalTrials.gov/show/NCT03096314 Completed Massachusetts General Hospital 2018-12-11
NCT03087149 Monitored vs Standard Supplementation of Vitamin D in Preterm Infants https://ClinicalTrials.gov/show/NCT03087149 Recruiting Princess Anna Mazowiecka Hospital, Warsaw, Poland 2019-12-31
NCT03070483 Blood Pressure in Blacks and Calcium (BBC) and Vitamin D Study https://ClinicalTrials.gov/show/NCT03070483 Completed Loyola University 2018-11-01
NCT03038516 ‘Palliative-D’ Vitamin D to Palliative Cancer Patients https://ClinicalTrials.gov/show/NCT03038516 Completed Stockholm County Council, Sweden 2020-06-09
NCT03035084 Is Vitamin D2 Treatment-associated Decrease in 25(OH)D3 Level a Reciprocal Phenomena? https://ClinicalTrials.gov/show/NCT03035084 Completed King Faisal Specialist Hospital & Research Center 2017-11-20
NCT03032328 Vitamin D Deficiency and Dysautonomia https://ClinicalTrials.gov/show/NCT03032328 Active, not recruiting Wake Forest University Health Sciences 2021-06-30
NCT03018132 Preeclampsia Research on Vitamin D, Inflammation, & Depression https://ClinicalTrials.gov/show/NCT03018132 Recruiting Cedars-Sinai Medical Center 2019-04-01
NCT02956408 Efficacy of Vitamin D Supplementation in Obese Children https://ClinicalTrials.gov/show/NCT02956408 Completed Columbia University 2019-10-30
NCT02954549 Vitamin D Supplementation in Warfighters https://ClinicalTrials.gov/show/NCT02954549 Completed Madigan Army Medical Center 2018-06-29
NCT02941185 Multi-dose Vitamin D Supplementation in Preterm Infants https://ClinicalTrials.gov/show/NCT02941185 Completed Zekai Tahir Burak Women’s Health Research and Education Hospital 2016-12-31
NCT02930434 Effects of Antarctic Environment on Vitamin D Status and Health Risk Biomarkers of Its Inhabitants https://ClinicalTrials.gov/show/NCT02930434 Completed Pontificia Universidad Catolica de Chile 2017-12-10
NCT02922803 Vitamin D and Physical Performance Before and After Intervention and Birth Outcome in Pregnant Somali and Swedish Women https://ClinicalTrials.gov/show/NCT02922803 Completed Uppsala University 2016-08-31
NCT02890823 Effect of Three Different Doses of Oral Cholecalciferol on 25-Hydroxyvitamin D Changes Among Epilepsy Patients With Hypovitaminosis D https://ClinicalTrials.gov/show/NCT02890823 Completed Chulalongkorn University 2016-03-31
NCT02881957 Hypovitaminosis D in Neurocritical Patients https://ClinicalTrials.gov/show/NCT02881957 Completed University of Utah 2018-10-10
NCT02876315 The Effect of Combinatorial Nutritional Supplementation on Immune Function in Healthy Older Adults https://ClinicalTrials.gov/show/NCT02876315 Active, not recruiting Oregon State University 2020-12-31
NCT02822651 Hypovitaminosis D Prediction Score https://ClinicalTrials.gov/show/NCT02822651 Completed Hospices Civils de Lyon 2017-11-17
NCT02805907 Efficacy of Calcifediol Supplementation in Asthma Control in Asthmatic Patients With Vitamin D Deficiency (ACViD) https://ClinicalTrials.gov/show/NCT02805907 Completed MurciaSalud 2017-01-31
NCT02802449 To Study the Nutri-Genomic Response of Vit-D Supplementation in African-Americans https://ClinicalTrials.gov/show/NCT02802449 Completed Charles Drew University of Medicine and Science 2016-03-31
NCT02783924 The GLOBAL Vitamin D Study. A Genomic, Transcriptomic, Proteomic and Metabolomic Approach https://ClinicalTrials.gov/show/NCT02783924 Completed University of Tromso 2017-09-30
NCT02750293 The Effect of Vitamin D Supplementation on Cardiovascular Risk Factors https://ClinicalTrials.gov/show/NCT02750293 Completed University of Tromso 2017-08-31
NCT02735200 Topical Delivery of Vitamin D3 as Vitamin D Supplementation https://ClinicalTrials.gov/show/NCT02735200 Completed Dammam University 2016-12-31
NCT02714361 A Study to Investigate the Effect of Vitamin D3 Supplementation on Iron Status in Iron Deficient Women https://ClinicalTrials.gov/show/NCT02714361 Completed University of Chester 2016-04-30
NCT02704624 Effects of Supplementation of Vitamin D in Patients With Crohn`s Disease https://ClinicalTrials.gov/show/NCT02704624 Enrolling by invitation Federal University of Juiz de Fora 2020-08-31
NCT02678364 Effect of Vitamin D-biofortified Eggs on Wintertime Serum 25-hydroxyvitamin D in Adults: Randomized Controlled Trial https://ClinicalTrials.gov/show/NCT02678364 Completed University College Cork 2015-12-31
NCT02676674 Vitamin D Levels Following Topical Application of Vitamin D Ointment https://ClinicalTrials.gov/show/NCT02676674 Completed University of Minnesota 2017-06-15
NCT02662491 Effects of Vitamin D and Calcium Supplementation on Health and Well-being of Vitamin D Deficient UAE Citizens https://ClinicalTrials.gov/show/NCT02662491 Completed United Arab Emirates University 2019-03-31
NCT02661191 Vitamin D Deficiency and Asthma Exacerbation https://ClinicalTrials.gov/show/NCT02661191 Completed University of Turin, Italy 2013-03-31
NCT02656121 Correction of Vitamin D Deficiency and Its Effect on Ovulation Induction in Women With PCOS (VIDEO): A Feasibility RCT https://ClinicalTrials.gov/show/NCT02656121 Completed Ain Shams University 2018-11-30
NCT02631629 Food-based Solutions for Optimal Vitamin D Nutrition and Health https://ClinicalTrials.gov/show/NCT02631629 Completed Technical University of Denmark 2016-05-31
NCT02621320 Vitamin D Supplementation in Wheelchair Indoor Athletes https://ClinicalTrials.gov/show/NCT02621320 Completed Swiss Paraplegic Centre Nottwil 2016-07-31
NCT02613884 Safety, Efficacy, and Feasibility of High-dose Cholecalciferol in Pediatric Patients With Cystic Fibrosis https://ClinicalTrials.gov/show/NCT02613884 Completed Johns Hopkins All Children’s Hospital 2019-11-25
NCT01325610 Vitamin D Effect on Calcium Absorption on Persons on Hemodialysis https://ClinicalTrials.gov/show/NCT01325610 Completed Creighton University 2012-01-31
NCT02590614 Genetic, Dietary and Environmental Influences on Vitamin D Metabolism https://ClinicalTrials.gov/show/NCT02590614 Completed Milton S. Hershey Medical Center 2018-05-31
NCT02589444 Vitamin D and Microbiota in Cystic Fibrosis https://ClinicalTrials.gov/show/NCT02589444 Completed Emory University 2017-02-28
NCT02572960 Physiologic Interactions Between the Adrenal- and the Parathyroid Glands https://ClinicalTrials.gov/show/NCT02572960 Completed University of Aarhus 2017-05-31
NCT03403933 Study of the Effect of Calcifediol Supplementation on Cardiopathic Patients Undergoing Major Orthopedic Surgery (Vitamina D). https://ClinicalTrials.gov/show/NCT03403933 Completed Istituto Ortopedico Galeazzi 2017-09-23
NCT02035423 Community Interventional Trial (CITFOMIST) https://ClinicalTrials.gov/show/NCT02035423 Completed Tehran University of Medical Sciences 2011-03-31
NCT03403647 Effect of Vitamin D on Everolimus Trough Concentrations Among Heart Transplanted Patients https://ClinicalTrials.gov/show/NCT03403647 Completed Sheba Medical Center 2019-04-10
NCT03402698 Vitamin D Supplementation in Children https://ClinicalTrials.gov/show/NCT03402698 Completed Children’s Memorial Health Institute, Poland 2018-05-26
NCT01317940 Nutrition and Body Composition in Acute Lymphoblastic Leukemia https://ClinicalTrials.gov/show/NCT01317940 Completed Children’s Hospital Los Angeles 2014-12-31
NCT02563015 Can Correction of Low Vitamin D Status in Infancy Program for a Leaner Body Composition? https://ClinicalTrials.gov/show/NCT02563015 Active, not recruiting McGill University 2022-02-20
NCT03395171 Vitamin D3 Supplementation and Stress Fracture Occurrence in High-Risk Collegiate Athletes https://ClinicalTrials.gov/show/NCT03395171 Completed Prisma Health-Midlands 2016-07-01
NCT02553447 Cholecalciferol in Treating Patients With Newly Diagnosed Non-Hodgkin Lymphoma or Chronic Lymphocytic Leukemia With Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT02553447 Recruiting University of Nebraska 2020-08-28
NCT02553044 Change in Free 25(OH)D After High Dose in Vitamin D Deficient Postmenopausal Women https://ClinicalTrials.gov/show/NCT02553044 Completed Sheffield Teaching Hospitals NHS Foundation Trust 2018-08-31
NCT02543671 Investigation of Vitamin D3 Enriched, Reduced-fat Yellow Cheese Efficacy to Prevent Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT02543671 Completed Harokopio University 2015-03-31
NCT02534064 Effect of Consumption of Yogurt Fortified in Calcium and Vit. D on Circulating Levels of 25OHD in Postmenopausal Women https://ClinicalTrials.gov/show/NCT02534064 Completed Yoplait France SAS 2015-10-31
NCT02506439 Nutritional Requirements for Vitamin D in Pregnant Women https://ClinicalTrials.gov/show/NCT02506439 Completed University College Cork 2017-04-01
NCT02485197 Muscle Metabolic Function in Older Adults With Different Vitamin D Status Before and After Exercise https://ClinicalTrials.gov/show/NCT02485197 Completed University of Kentucky 2013-10-31
NCT02483026 Nutritional Deficiencies Preventive Treatment Prior to Laparoscopic Sleeve Gastrectomy https://ClinicalTrials.gov/show/NCT02483026 Completed Hadassah Medical Organization 2019-12-01
NCT02477956 Effect of a Monthly High Dose of Vitamin D3 on Bariatric Surgery Patients https://ClinicalTrials.gov/show/NCT02477956 Completed Texas Tech University 2013-11-30
NCT02460380 The Effects of Vitamin D on Angiogenic Factors in Women With Polycystic Ovary Syndrome https://ClinicalTrials.gov/show/NCT02460380 Completed Maimonides Medical Center 2015-03-31
NCT02460211 Acute Effect of Systemic Stress on Measured Blood Concentrations of 25 (OH) Vitamin D https://ClinicalTrials.gov/show/NCT02460211 Active, not recruiting Intermountain Health Care, Inc. 2018-10-01
NCT02457247 Calcichew D3 Preference Study in Participants Eligible for Calcium and Vitamin D Supplementation. https://ClinicalTrials.gov/show/NCT02457247 Completed Takeda 2015-08-31
NCT02452762 Rapid Normalization of Vitamin D in Critically Ill Children: A Phase II Dose Evaluation Randomized Controlled Trial https://ClinicalTrials.gov/show/NCT02452762 Completed Children’s Hospital of Eastern Ontario 2017-11-30
NCT02451787 The ‘Hidden’ Biological Impact of Vitamin D Deficiency: a Biomarker Study; Part 2 https://ClinicalTrials.gov/show/NCT02451787 Completed The Hong Kong Polytechnic University 2016-07-31
NCT02443246 A Prospective, Multi-center Study to Evaluate the Efficacy and Safety of Vitamin D3 B.O.N. Intramuscular Injection in Adults With Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT02443246 Completed Kwang Dong Pharmaceutical co., ltd. 2015-08-31
NCT02434380 Effect of Vitamin D Replacement on Maternal and Neonatal Outcomes https://ClinicalTrials.gov/show/NCT02434380 Active, not recruiting American University of Beirut Medical Center 2018-10-31
NCT02414529 Efficacy of Vitamin D Therapy on Glucose Homeostasis in Obese Adolescents https://ClinicalTrials.gov/show/NCT02414529 Completed NYU Langone Health 2015-10-31
NCT02404623 The Effect of Vitamin D Administration to Premature Infants on Vitamin D Status and Respiratory Morbidity https://ClinicalTrials.gov/show/NCT02404623 Completed Soroka University Medical Center 2018-02-12
NCT02395081 Trial of Vitamin D Supplements to Raise Calcidiol Levels of Pregnant Women in Mongolia https://ClinicalTrials.gov/show/NCT02395081 Completed Brigham and Women’s Hospital 2016-12-31
NCT02362269 Personalized Vitamin D Supplementation in European and African Americans https://ClinicalTrials.gov/show/NCT02362269 Completed University of Wisconsin, Madison 2019-05-03
NCT02360644 Drug Metabolizing Enzyme and Transporter Function in Chronic Kidney Disease https://ClinicalTrials.gov/show/NCT02360644 Active, not recruiting University of Colorado, Denver 2020-09-30
NCT02349282 The Effect of Calcifediol (Hy.D 25 SD/S) and Vitamin D3 on Muscle Strength in a Frail Elderly Population https://ClinicalTrials.gov/show/NCT02349282 Completed Wageningen University 2015-12-31
NCT02328404 The Effect of Vitamin D Supplementation Among Overweight Jordanian Women With Polycystic Ovary Syndrome (PCOS) https://ClinicalTrials.gov/show/NCT02328404 Completed Hayat Pharmaceutical Co. PLC 2014-09-30
NCT02297568 Vitamin D Supplementation During Lactation https://ClinicalTrials.gov/show/NCT02297568 Completed Rajavithi Hospital 2015-06-30
NCT02293187 Impact of Vitamin D on 25-hydroxyvitamin D Levels and Physical Function https://ClinicalTrials.gov/show/NCT02293187 Completed Tufts University 2017-09-13
NCT02282813 Extension Study of CTAP101-CL-3001 or CTAP101-CL-3002 https://ClinicalTrials.gov/show/NCT02282813 Completed OPKO Health, Inc. 2015-05-31
NCT02275650 The Role of Narrowband Ultraviolet B Exposure in the Maintenance of Vitamin D Levels During Winter https://ClinicalTrials.gov/show/NCT02275650 Completed Joint Authority for Päijät-Häme Social and Health Care 2014-05-31
NCT02271971 Effect of Vitamin D Supplementation on Metabolic Parameters of Patients With Psoriasis https://ClinicalTrials.gov/show/NCT02271971 Completed Pontificia Universidad Catolica de Chile 2015-04-30
NCT02234544 Effect of an Inhibitor of Cholesterol Absorption on Vitamin D Levels https://ClinicalTrials.gov/show/NCT02234544 Completed Federal University of Rio Grande do Sul 2015-04-30
NCT02217553 The Effect of Vitamin D Supplementation on HIV-associated Platelet Hyperreactivity https://ClinicalTrials.gov/show/NCT02217553 Completed Universitas Padjadjaran 2014-02-28
NCT02214563 Cholecalciferol Supplementation for Anemia and Mineral and Bone Disorder in Hemodialysis Patients https://ClinicalTrials.gov/show/NCT02214563 Completed Osaka University 2016-03-31
NCT02210884 Maternal Vit D Supplements & Infant and Maternal Biomarkers & Outcomes in Southern Ethiopia https://ClinicalTrials.gov/show/NCT02210884 Completed Oklahoma State University 2016-09-30
NCT02186535 The Role of Vitamin D in Female Reproductive Tract Immunity https://ClinicalTrials.gov/show/NCT02186535 Completed CONRAD 2015-07-31
NCT02186106 Dosage Calculation for Vitamin D Treatment https://ClinicalTrials.gov/show/NCT02186106 Completed Bispebjerg Hospital 2013-06-30
NCT02186028 Effect of Oral Daily Supplementation With 400 IU Vs 200 IU of Vitamin D in Term Healthy Neonates https://ClinicalTrials.gov/show/NCT02186028 Completed Lady Hardinge Medical College 2015-06-30
NCT02168660 Correction of Vitamin D Levels and Its Effect on Insulin Resistance and Weight Gain in Obese Youth https://ClinicalTrials.gov/show/NCT02168660 Completed University of Texas Southwestern Medical Center 2013-09-30
NCT02158143 A Single High-dose Oral Supplement of Vitamin D in Young Chinese https://ClinicalTrials.gov/show/NCT02158143 Completed Chinese Academy of Sciences 2014-04-30
NCT02145195 The Effect of Vitamin D Supplements on Vitamin D Status, Cardiometabolic Health and Immune Defense in Danish Children https://ClinicalTrials.gov/show/NCT02145195 Completed University of Copenhagen 2015-03-31
NCT02136771 Styrian Vitamin D Hypertension Trial https://ClinicalTrials.gov/show/NCT02136771 Completed Medical University of Graz 2014-08-31
NCT02135913 Roles of Vitamin D and HDL in Obese Children https://ClinicalTrials.gov/show/NCT02135913 Completed University of Kentucky 2017-04-26
NCT02132442 Hepatic Dysfunction, Vitamin D Status, and Glycemic Control in Diabetes https://ClinicalTrials.gov/show/NCT02132442 Completed University of Massachusetts, Worcester 2016-10-31
NCT02118129 Vitamin D Among Young Adults: an Intervention Study Using a Mobile ‘App’. https://ClinicalTrials.gov/show/NCT02118129 Completed University of Guelph 2015-12-31
NCT02101151 Effect of Vitamin D Supplementation on the Metabolic Control and Body Composition of Type 2 Diabetes Subjects in Ajman (UAE) https://ClinicalTrials.gov/show/NCT02101151 Completed Rashid Centre for Diabetes and Research 2012-12-31
NCT02099955 Vitamin D Deficiency and Replacement on Pulmonary and Endocrine Function in SCI https://ClinicalTrials.gov/show/NCT02099955 Completed James J. Peters Veterans Affairs Medical Center 2015-12-31
NCT02091219 Effects of Vitamin D3 Versus 25OHD3 on Mineral Metabolism and Immune Function https://ClinicalTrials.gov/show/NCT02091219 Recruiting University of California, Los Angeles 2019-06-30
NCT02069990 Controlled, Randomized, Four-arm Comparative, Open Label, Multi-centric Clinical Trial to Compare the Efficacy and Safety Parameters of the Once-a-week or Once-a-month Administered 7000 IU, or 30000 IU Vitamin D (Cholecalciferol) to a 1000 IU Dosage Applied Daily in Vitamin D Deficient Patients https://ClinicalTrials.gov/show/NCT02069990 Completed Semmelweis University 2013-09-30
NCT01315366 Hypovitaminosis D : A Link Between Bone/Mineral and Fat/Fuel Metabolism https://ClinicalTrials.gov/show/NCT01315366 Completed American University of Beirut Medical Center 2014-08-31
NCT01306656 Vitamin D Repletion in Primary Hyperparathyroidism https://ClinicalTrials.gov/show/NCT01306656 Completed Columbia University 2017-02-28
NCT01295879 Vitamin D Repletion in Stone Formers With Hypercalciuria https://ClinicalTrials.gov/show/NCT01295879 Completed New York Presbyterian Hospital 2011-04-30
NCT01292720 Vitamin D Supplementation in Chronic Stable Heart Failure https://ClinicalTrials.gov/show/NCT01292720 Completed Medical University of Graz 2013-10-31
NCT01287455 The Effect of Vitamin D Replacement on Airway Reactivity, Allergy and Inflammatory Mediators in Exhaled Breath Condensate in Vitamin D Deficient Asthmatic Children https://ClinicalTrials.gov/show/NCT01287455 Completed Rambam Health Care Campus 2012-02-29
NCT03356873 Impact of Correction of Vitamin D Deficiency in Oxidative Stress in Patients With Prediabetes (VICOX) https://ClinicalTrials.gov/show/NCT03356873 Recruiting Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran 2019-09-01
NCT03608488 The Effect of Vitamin D and Exercise on Balance in Postmenopausal Women https://ClinicalTrials.gov/show/NCT03608488 Completed Sultan Abdulhamid Han Training and Research Hospital, Istanbul, Turkey 2019-07-12
NCT02009748 Vitamin D Supplementation in Cirrhotic Patients https://ClinicalTrials.gov/show/NCT02009748 Completed Medical University of Graz 2014-08-31
NCT02008201 Vitamin D Status and Supplementation in Athletes https://ClinicalTrials.gov/show/NCT02008201 Completed Wageningen University 2014-04-30
NCT01998763 Vitamin D Intervention Trial in Healthy Chinese, Phase II https://ClinicalTrials.gov/show/NCT01998763 Completed Chinese Academy of Sciences 2014-05-31
NCT01993537 The Role of Vitamin D in the Pathophysiology of Chronic Failure https://ClinicalTrials.gov/show/NCT01993537 Completed Ottawa Heart Institute Research Corporation 2016-01-31
NCT01992133 Effects of Vitamin D Supplementation on Glucose Metabolism in Women With Former Gestational Diabetes Mellitus https://ClinicalTrials.gov/show/NCT01992133 Completed RCSI & UCD Malaysia Campus 2012-08-31
NCT01991054 The Effects of Vitamin D Supplementation on Patients With Type 2 Diabetes and Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT01991054 Completed HaEmek Medical Center, Israel 2017-12-31
NCT01990872 Inter-relationship Between Vitamin D Requirements and Calcium Intake in Older Adults https://ClinicalTrials.gov/show/NCT01990872 Completed University College Cork 2013-11-30
NCT01971801 Vitamin D Supplementation in Older Adults With Urinary Incontinence https://ClinicalTrials.gov/show/NCT01971801 Completed University of Alabama at Birmingham 2017-08-31
NCT01930539 Treatment of Vitamin D Deficiency in Intestinal Rehabilitation Clinic Patients With a Portable Ultraviolet B Lamp https://ClinicalTrials.gov/show/NCT01930539 Completed University of Nebraska 2015-06-30
NCT01924910 A Single Wintertime Dose of Vitamin D3 to Prevent Winter Decline in Vitamin D Status in Healthy Adults https://ClinicalTrials.gov/show/NCT01924910 Completed Emory University 2013-12-31
NCT01910792 Ultraviolet Light And Vitamin D In Subjects With Fat Malabsorption Or After Gastric Bypass Surgery https://ClinicalTrials.gov/show/NCT01910792 Completed Boston University 2014-02-28
NCT01909063 A Randomized Controlled Trial Testing The Effect Of A Multi-Nutrient Fortified Juice https://ClinicalTrials.gov/show/NCT01909063 Completed Boston University 2008-01-31
NCT01896544 Cholecalciferol Supplementation for Sepsis in the ICU https://ClinicalTrials.gov/show/NCT01896544 Completed Massachusetts General Hospital 2014-08-31
NCT01877577 Supplementation of Vitamin D3 in Patients With Inflammatory Bowel Diseases and Hypovitaminosis D https://ClinicalTrials.gov/show/NCT01877577 Completed University of California, San Francisco 2013-07-31
NCT01855321 Effects of Treating Vitamin D Deficiency in Poorly Controlled Type 2 Diabetes https://ClinicalTrials.gov/show/NCT01855321 Completed University of Florida 2015-03-31
NCT01848236 Effects of Vitamin D Insufficiency in Man https://ClinicalTrials.gov/show/NCT01848236 Completed University of California, Los Angeles 2020-02-29
NCT01845142 Immunologic Action of a Single Dose Cholecalciferol https://ClinicalTrials.gov/show/NCT01845142 Completed Charite University, Berlin, Germany 2013-05-31
NCT01838447 Prevention of Vitamin D Deficiency Following Pediatric CHD Surgery: a Phase II Dose Evaluation Randomized Controlled Trial Comparing Usual Care With a High Dose Pre-operative Supplementation Regimen Based on the Institute of Medicine Daily Upper Tolerable Intake Level https://ClinicalTrials.gov/show/NCT01838447 Completed Children’s Hospital of Eastern Ontario 2015-12-31
NCT01827345 Vitamin D as a Supplement Against Falls in Elderly Study https://ClinicalTrials.gov/show/NCT01827345 Completed University of Florida 2016-04-30
NCT01817036 Vitamin D Intervention Trial in Healthy Chinese https://ClinicalTrials.gov/show/NCT01817036 Completed Chinese Academy of Sciences 2013-05-31
NCT01815437 Evaluating Vitamin D Content in Mushrooms https://ClinicalTrials.gov/show/NCT01815437 Completed Boston University 2013-06-30
NCT01797302 Vitamin D and Vascular Health in Children https://ClinicalTrials.gov/show/NCT01797302 Completed University of Pittsburgh 2018-08-13
NCT01784029 Treatment Study of Vitamin D Deficiency in Adolescents https://ClinicalTrials.gov/show/NCT01784029 Completed Montefiore Medical Center 2014-07-31
NCT01778114 Availability of Vitamin D in Orange Juice https://ClinicalTrials.gov/show/NCT01778114 Completed Boston University 2007-06-30
NCT01746264 Effect of Vitamin D Supplementation on Endothelial Function in Obese Adolescents https://ClinicalTrials.gov/show/NCT01746264 Completed Mayo Clinic 2013-12-31
NCT01741324 Comparing Different Amounts of Vitamin D Supplementation to Preschool Children Living in Northern and Southern Sweden https://ClinicalTrials.gov/show/NCT01741324 Completed Umeå University 2013-04-30
NCT01741233 The Genetics Behind Vitamin D Status (VitDgen) https://ClinicalTrials.gov/show/NCT01741233 Completed Technical University of Denmark 2013-03-31
NCT01741181 Vitamin D Supplementation in Patients With Diabetes Mellitus Type 2 https://ClinicalTrials.gov/show/NCT01741181 Completed Tan Tock Seng Hospital 2014-11-30
NCT01726777 Effect of Vitamin D Supplementation on Glucose Tolerance in Subjects at Risk for Diabetes With Low Vitamin D. https://ClinicalTrials.gov/show/NCT01726777 Completed University of Toronto 2015-09-30
NCT01721915 Vitamin D Treatment, Pharmacogenetics and Glucose Metabolism https://ClinicalTrials.gov/show/NCT01721915 Completed Medical University of Graz 2017-10-12
NCT01704079 Safety and Efficacy of CTAP101 to Treat Secondary Hyperparathyroidism in Stage 3 or 4 CKD and Vitamin D Insufficiency https://ClinicalTrials.gov/show/NCT01704079 Completed OPKO Health, Inc. 2014-08-31
NCT01697228 The Effects of Vitamin D on Glycemic Control and Proinflammatory Markers in Adolescents With T1DM https://ClinicalTrials.gov/show/NCT01697228 Completed Children’s Hospital Los Angeles 2014-03-31
NCT01696526 Bioefficiency of of Conventional Fish and Vitamin D Fortified Fish https://ClinicalTrials.gov/show/NCT01696526 Completed Martin-Luther-Universität Halle-Wittenberg 2012-12-31
NCT01694355 The Impact of Severe Vitamin D Deficiency and Its Correction on Bone Mineral Density (BMD) in Postmenopausal Women https://ClinicalTrials.gov/show/NCT01694355 Completed Soroka University Medical Center 2018-10-31
NCT01691833 The Effect of Hypovitaminosis D and Vitamin D Supplementation on Fracture Nonunion Rates https://ClinicalTrials.gov/show/NCT01691833 Completed Atrium Health 2017-01-31
NCT01689779 High Dose Preoperative Cholecalciferol Supplementation and Perioperative Vitamin D Status https://ClinicalTrials.gov/show/NCT01689779 Completed Massachusetts General Hospital 2015-05-31
NCT01688102 The Effect of Oral Vitamin D Versus Narrow-Band UV-B Exposure on the Lipid Profile https://ClinicalTrials.gov/show/NCT01688102 Completed Rockefeller University 2015-07-31
NCT04120064 Treatment of Vitamin D Deficiency With Large Bolus Cholecalciferol https://ClinicalTrials.gov/show/NCT04120064 Recruiting Parkview Medical Center 2020-12-31
NCT01656070 Vitamin D Supplementation in HIV-infected Youth https://ClinicalTrials.gov/show/NCT01656070 Completed University of Milan 2012-07-31
NCT01655810 Vitamin D, Cardiovascular Disease, and African Americans https://ClinicalTrials.gov/show/NCT01655810 Completed Washington University School of Medicine 2018-02-09
NCT01651000 Safety and Efficacy of CTAP101 to Treat Secondary Hyperparathyroidism in Stage 3 or 4 CKD and Vitamin D Insufficiency https://ClinicalTrials.gov/show/NCT01651000 Completed OPKO Health, Inc. 2014-07-31
NCT01639222 Human Pharmacology Trial of Calcium-vitamin D3 Tablet in Healthy Participants https://ClinicalTrials.gov/show/NCT01639222 Completed Takeda 2012-08-31
NCT01638494 Calcium and Vitamin D Intakes in Children https://ClinicalTrials.gov/show/NCT01638494 Completed Federico II University 2009-02-28
NCT01636570 Vitamin D3 Supplementation for Heart Failure Patients https://ClinicalTrials.gov/show/NCT01636570 Completed Saint Patrick Hospital 2015-04-30
NCT01633853 Efficacy of Vitamin D2 to Treat Chronic Kidney Disease Mineral and Bone Disorder https://ClinicalTrials.gov/show/NCT01633853 Completed Capital Medical University 2015-09-30
NCT01600430 Vitamin D Supplementation for Extremely Preterm Infants https://ClinicalTrials.gov/show/NCT01600430 Completed University of Alabama at Birmingham 2014-12-31
NCT01596842 Effect of Omega-3 Fatty Acid on Vitamin D Activation https://ClinicalTrials.gov/show/NCT01596842 Completed Dong-A University 2012-12-31
NCT01583621 Vitamin D Supplementation in Overweight/Obese African American Adults and Youth (D-SUNNY) https://ClinicalTrials.gov/show/NCT01583621 Completed Augusta University 2012-11-30
NCT01570309 Vitamin D Repletion in Coronary Artery Disease https://ClinicalTrials.gov/show/NCT01570309 Completed New York City Health and Hospitals Corporation 2011-03-31
NCT01568255 Is Treatment of Vitamin D Deficiency Associated With Resolution of Statin-Induced Muscular Symptoms https://ClinicalTrials.gov/show/NCT01568255 Recruiting Cedars-Sinai Medical Center 2021-03-31
NCT01549938 Cholecalciferol Intervention to Prevent Respiratory Infections Study https://ClinicalTrials.gov/show/NCT01549938 Completed Menzies Institute for Medical Research 2012-10-31
NCT01546103 Vitamin D3 Supplementation Pilot Study https://ClinicalTrials.gov/show/NCT01546103 Completed Children’s Hospital of Philadelphia 2012-09-30
NCT01537809 Impact of Vitamin D Supplementation on Cardiometabolic Risk Factors [The Daily D Health Study] https://ClinicalTrials.gov/show/NCT01537809 Completed Tufts University 2013-12-31
NCT01535508 Open Label Clinical Trial of Vitamin D in Children With Autism https://ClinicalTrials.gov/show/NCT01535508 Completed University of California, San Francisco 2015-09-30
NCT01524874 Comparative Effectiveness of Vitamin D and Repletion Strategies https://ClinicalTrials.gov/show/NCT01524874 Completed Bastyr University 2011-09-30
NCT01519986 The Effect of Fat on Vitamin D Absorption https://ClinicalTrials.gov/show/NCT01519986 Completed Federal University of Rio Grande do Sul 2011-10-31
NCT01508845 A Pilot Study of the Effect of Dietary Fat Type and Amount on Vitamin D3 Absorption https://ClinicalTrials.gov/show/NCT01508845 Completed Tufts University 2013-06-30
NCT01506557 Vitamin D Supplementation of Lactating Mothers https://ClinicalTrials.gov/show/NCT01506557 Completed Children’s Memorial Health Institute, Poland 2012-10-31
NCT01497132 Effects of Vitamin D on Beta Cell Function and Insulin Sensitivity in Pre-diabetes and Diabetes Mellitus Type 2 https://ClinicalTrials.gov/show/NCT01497132 Completed Karolinska Institutet 2013-05-31
NCT01490333 Sunweavers: Supporting Native American Women’s Vitamin D Research https://ClinicalTrials.gov/show/NCT01490333 Completed University of Wisconsin, Madison 2014-01-31
NCT01488734 Bioavailability and Biological Effects of Vitamin D2 Contained in Mushroom https://ClinicalTrials.gov/show/NCT01488734 Completed Icahn School of Medicine at Mount Sinai 2013-09-30
NCT01480869 Study of Vitamin D Supplementation Tailored to Vitamin D Deficiency in Breast Cancer Patients https://ClinicalTrials.gov/show/NCT01480869 Completed Institut du Cancer de Montpellier - Val d’Aurelle 2014-12-31
NCT01477034 Vitamin D and Adipose Tissue Inflammation https://ClinicalTrials.gov/show/NCT01477034 Completed Fred Hutchinson Cancer Research Center 2013-06-30
NCT01443897 Effect of Consumption of Post-harvest UV-B Treated Mushrooms on Vitamin D Status of Healthy Adults https://ClinicalTrials.gov/show/NCT01443897 Completed USDA, Western Human Nutrition Research Center 2010-11-30
NCT01443728 Vitamin D for Sickle-cell Respiratory Complications https://ClinicalTrials.gov/show/NCT01443728 Active, not recruiting Columbia University 2013-06-20
NCT01437696 How Much Vitamin D is Required to be Protective Against Deficiency During the Winter Months? https://ClinicalTrials.gov/show/NCT01437696 Completed McGill University 2014-05-31
NCT01436916 Oral Cholecalciferol in Prevention of Type 2 Diabetes Mellitus https://ClinicalTrials.gov/show/NCT01436916 Completed Postgraduate Institute of Medical Education and Research 2012-09-30
NCT01430793 Determination of Effective Vitamin D Replacement and Monitoring Strategies in Vitamin D Deficiency State https://ClinicalTrials.gov/show/NCT01430793 Completed Aga Khan University 2013-03-31
NCT01426347 Treatment of Vitamin D Deficiency in Patients With Rheumatoid Arthritis https://ClinicalTrials.gov/show/NCT01426347 Completed Johns Hopkins University 2012-01-31
NCT01419119 Vitamin Deficiency in Immigrants, a Treatment Study https://ClinicalTrials.gov/show/NCT01419119 Completed Umeå University 2012-10-31
NCT01417351 Effects of Vitamin D Supplementation During Pregnancy on Clinical Outcomes and Immune Function https://ClinicalTrials.gov/show/NCT01417351 Completed USDA, Western Human Nutrition Research Center 2013-05-31
NCT01410084 Improving Vitamin D Status in Home-bound Elders https://ClinicalTrials.gov/show/NCT01410084 Completed Wake Forest University Health Sciences 2011-08-31
NCT01399151 Assessment of Vitamin D Supplementation and Immune Function https://ClinicalTrials.gov/show/NCT01399151 Completed USDA, Western Human Nutrition Research Center 2013-12-31
NCT01395589 Rapid vs Maintenance Vitamin D Supplementation in Deficient Children With Asthma to Prevent Exacerbations. https://ClinicalTrials.gov/show/NCT01395589 Completed Hamad Medical Corporation 2014-01-31
NCT01385098 Efficacy of Vitamin D Supplementation in Bariatric Surgery Patients https://ClinicalTrials.gov/show/NCT01385098 Completed The Methodist Hospital System 2013-05-31
NCT01363167 Identifying Vitamin D Deficiency in Very Low Birth Weight Infant (VLBW) Infants Part 2 https://ClinicalTrials.gov/show/NCT01363167 Completed Medical University of South Carolina 2013-10-31
NCT01354262 Effect of Vitamin D Supplementation on Hemoglobin A1c https://ClinicalTrials.gov/show/NCT01354262 Completed Ascension Genesys Hospital 2012-01-31
NCT01349127 Trial to Assess Vitamin D Requirements in Lactating Women https://ClinicalTrials.gov/show/NCT01349127 Completed University College Cork 2009-12-31
NCT01325987 African American Children, Glycemic Control, and Type 2 Diabetes https://ClinicalTrials.gov/show/NCT01325987 Completed University of Alabama at Birmingham 2012-12-31
NCT04407286 Vitamin D Testing and Treatment for COVID 19 https://ClinicalTrials.gov/show/NCT04407286 Recruiting Arizona State University 2020-08-18
NCT04377399 High vs Low Dose Vitamin D in Patients With Diabetic Peripheral Neuropathy https://ClinicalTrials.gov/show/NCT04377399 Completed Federal State Budgetary Institution, V. A. Almazov Federal North-West Medical Research Centre, of the Ministry of Health 2019-06-20
NCT04359524 Vitamin D Supplementation in Conscripts https://ClinicalTrials.gov/show/NCT04359524 Completed Tartu University Hospital 2017-04-20
NCT04323852 Can Vitamin D Reduce Heart Muscle Damage After Bypass Surgery? https://ClinicalTrials.gov/show/NCT04323852 Completed Shahid Beheshti University of Medical Sciences 2018-12-01
NCT04319289 Effect of Aerobic Interval Training With Vitamin D Supplement on Functional Capacity and Perceived Myalgia https://ClinicalTrials.gov/show/NCT04319289 Completed Cairo University 2020-05-15
NCT04291833 Prospective, Assessment of Vitamin D and Calcium Supplementation, Improvement of Nutritional Status and Preoperative Rehabilitation in Patients Before Knee Arthroplasty. https://ClinicalTrials.gov/show/NCT04291833 Completed Jagiellonian University 2017-12-31
NCT04244474 Effect of Vitamin D Supplementation on Improvement of Pneumonic Children https://ClinicalTrials.gov/show/NCT04244474 Active, not recruiting Cairo University 2019-12-15
NCT04229368 Effect of Vitamin D Status and Repletion on Postoperative Total Joint Arthroplasty Complications https://ClinicalTrials.gov/show/NCT04229368 Recruiting Brigham and Women’s Hospital 2021-07-01
NCT04207294 Vitamin D Enriched Meat Project (Acute Study) https://ClinicalTrials.gov/show/NCT04207294 Recruiting University of Ulster 2020-04-10
NCT04204304 Relationship Between Serum Vitamin D Levels and Musculoskeletal Adverse Effects in Patients Using Isotretinoin https://ClinicalTrials.gov/show/NCT04204304 Completed Ankara Training and Research Hospital 2019-08-15
NCT04183257 Effect of Escalating Oral Vitamin D Replacement on HOMA-IR in Vitamin D Deficient Type 2 Diabetics https://ClinicalTrials.gov/show/NCT04183257 Completed King Edward Medical University 2017-04-30
NCT04156074 Innovative Food Structures to Enhance Nutrient Bioavailability https://ClinicalTrials.gov/show/NCT04156074 Recruiting University College Dublin 2021-12-31
NCT04117581 A Study to Investigate the Effect of Vitamin D3 Supplementation on Asthma Symptoms in Adults With Asthma (VITDAS) https://ClinicalTrials.gov/show/NCT04117581 Recruiting University of Chester 2021-07-31
NCT04100226 Vitamin D Deficiency and Effect of Its Supplementation on Interstitial Lung Diseases(ILD). https://ClinicalTrials.gov/show/NCT04100226 Active, not recruiting Cairo University 2019-11-01
NCT04091178 Vitamin D Supplementation to Correct the Vitamin D Deficiency for Breast Cancer https://ClinicalTrials.gov/show/NCT04091178 Completed Institut du Cancer de Montpellier - Val d’Aurelle 2015-06-11
NCT04038853 Vitamin D in Fatty Liver Disease https://ClinicalTrials.gov/show/NCT04038853 Completed University Hospital Rijeka 2017-02-01
NCT04033796 Vitamin D Supplementation D_SAF Pilot Study https://ClinicalTrials.gov/show/NCT04033796 Completed University of Surrey 2016-06-10
NCT04010942 Vitamin D for Polycystic Ovary Syndrome Clomiphene Resistant Women https://ClinicalTrials.gov/show/NCT04010942 Completed Ain Shams University 2018-12-30
NCT04005573 The Combined Effect of Omega-3 Fatty Acid and Vitamin D3 on Lipid Profile Levels and Oxidized Low Density Lipoprotein https://ClinicalTrials.gov/show/NCT04005573 Completed Applied Science Private University 2019-11-01
NCT03991845 A Trial to Evaluate the Effect of Vitamin D Supplementation in Patients With Chronic Urticaria https://ClinicalTrials.gov/show/NCT03991845 Enrolling by invitation Postgraduate Institute of Medical Education and Research 2019-11-27
NCT03986268 Vitamin D Replacement Therapy Can Affects Pathological Response in Neoadjuvant Breast Cancer Treatment https://ClinicalTrials.gov/show/NCT03986268 Recruiting Florence Nightingale Hospital, Istanbul 2020-05-10
NCT03931889 Effects of Vitamin D3 Supplementation on Antioxidant Enzymes Status in Vitamin D3 Deficient Asthma COPD Overlap (ACO) Patients https://ClinicalTrials.gov/show/NCT03931889 Active, not recruiting Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh 2019-06-30
NCT03920150 Vitamin D 24’000 IU for Oral Intermittent Supplementation https://ClinicalTrials.gov/show/NCT03920150 Completed University Hospital, Basel, Switzerland 2020-05-31
NCT03919812 Immunomodulatory Vitamin D in Thalassemia https://ClinicalTrials.gov/show/NCT03919812 Completed Universitas Padjadjaran 2018-07-15
NCT03890458 The Effect of Vitamin D on Fertility https://ClinicalTrials.gov/show/NCT03890458 Completed Akdeniz University 2017-11-30
NCT03876704 Effects of Fat-soluble Vitamins Supplementation on Common Complications and Neural Development in Very Low Birth Weight Infants https://ClinicalTrials.gov/show/NCT03876704 Recruiting First Affiliated Hospital Xi’an Jiaotong University 2019-09-30
NCT03810261 Challenges in Achieving Adequate Vitamin D Status in the Adult Population/ Part 2 https://ClinicalTrials.gov/show/NCT03810261 Active, not recruiting Nutrition Institute, Slovenia 2020-10-31
NCT03792984 The Effect of Calcium and Vitamin D Supplements on Metabolic and Hormonal Disturbances in Polycystic Ovary Syndrome Patients https://ClinicalTrials.gov/show/NCT03792984 Completed Damascus University 2017-10-01
NCT03783273 The Influence of Food Matrix Delivery System on the Bioavailability of Vitamin D3 https://ClinicalTrials.gov/show/NCT03783273 Completed University of Aarhus 2020-05-26
NCT03782805 Effect of Vitamin D Supplementation on Inflammatory Markers https://ClinicalTrials.gov/show/NCT03782805 Completed Université d’Auvergne 2018-06-07
NCT03773809 Impact of Vitamin D3 Administration on Cardiac Autonomic Tone in Asthma Chronic Obstructive Pulmonary Disease(COPD) Overlap Patients https://ClinicalTrials.gov/show/NCT03773809 Completed Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh 2018-06-30
NCT03742505 Rapid Normalization of Vitamin D Deficiency in PICU https://ClinicalTrials.gov/show/NCT03742505 Recruiting Children’s Hospital of Eastern Ontario 2023-05-31
NCT03735303 Effect of Vitamin D3 and Omega-3FA on Leptin and HbA1C With Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT03735303 Completed Applied Science Private University 2019-03-01
NCT03734744 PK/PD of Vitamin D3 in Adults With CF https://ClinicalTrials.gov/show/NCT03734744 Recruiting University of Southern California 2019-11-01
NCT03718182 Can Vitamin D Supplementation in People With Crohn’s Disease Improve Symptoms as an Adjunct Therapy? https://ClinicalTrials.gov/show/NCT03718182 Recruiting University Hospital Birmingham NHS Foundation Trust 2020-11-30
NCT03695562 Stability of Implants Placed in Patients With Vitamin D Deficiency Using Sequential Drilling vs a Single Drilling Design https://ClinicalTrials.gov/show/NCT03695562 Active, not recruiting Cairo University 2020-11-27
NCT03686150 Vitamin D Supplementation in Children With Obesity-Related Asthma https://ClinicalTrials.gov/show/NCT03686150 Active, not recruiting IDeA States Pediatric Clinical Trials Network 2021-01-31
NCT03649802 Vitamin D and Arterial Stiffness in Elderly https://ClinicalTrials.gov/show/NCT03649802 Enrolling by invitation Texas Tech University Health Sciences Center 2021-12-31
NCT03648528 Cholecalciferol Supplementation Effect on Parathyroid Hormone in Hemodialysis Patients https://ClinicalTrials.gov/show/NCT03648528 Completed Cooperativa Asistencia Sindicato Médico Uruguay 2018-05-31
NCT03644212 Vitamin D Increases Serum Levels of the Soluble Receptor for Advanced Glycation End Products in Women With PCOS https://ClinicalTrials.gov/show/NCT03644212 Completed Maimonides Medical Center 2013-09-30
NCT03613116 High-dose Vitamin D Supplements in Older Adults https://ClinicalTrials.gov/show/NCT03613116 Recruiting University of California, Davis 2022-03-30
NCT03602430 Cholecalciferol on Hemodialysis Patients https://ClinicalTrials.gov/show/NCT03602430 Completed Ain Shams University 2018-09-15
NCT03602261 Safety, Efficacy, PK and PD of CTAP101 (Calcifediol) ER Capsules for SHPT in HD Patients VDI https://ClinicalTrials.gov/show/NCT03602261 Recruiting OPKO Health, Inc. 2020-12-31
NCT03588884 Repeated-dose Safety, Efficacy, PK and PD of CTAP101, IR Calcifediol, High-dose Cholecalciferol, and Paricalcitol Plus Low-dose Cholecalciferol in Patients With SHPT, CKD 3-4 and VDI https://ClinicalTrials.gov/show/NCT03588884 Recruiting OPKO Health, Inc. 2020-03-17
NCT03544671 Effect of Vitamin D3 Supplementation in Children From 12 to 30 Months of Age. https://ClinicalTrials.gov/show/NCT03544671 Completed Instituto Nacional de Salud Publica, Mexico 2017-06-18
NCT03536845 Vitamin D Supplementation to Prevent Vitamin D Deficiency for Children With Epilepsy https://ClinicalTrials.gov/show/NCT03536845 Recruiting King Saud University 2021-01-01
NCT03521492 Vitamin D Status With Early Childhood Caries https://ClinicalTrials.gov/show/NCT03521492 Completed Ministry of Health, Saudi Arabia 2018-02-20
NCT03504280 Changes in Serum Vitamin D Level After Different Loading Doses of Cholecalciferol https://ClinicalTrials.gov/show/NCT03504280 Completed Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh 2017-08-31
NCT03478475 Vitamin D Supplementation and and Glycemic Indexes https://ClinicalTrials.gov/show/NCT03478475 Completed Université d’Auvergne 2015-09-19
NCT03472833 High-dose Vitamin D3 in Pancreas Cancer https://ClinicalTrials.gov/show/NCT03472833 Recruiting Medical University of Graz 2020-05-31
NCT03463642 The Efficacy of Different Vitamin D Supplementation Delivery Methods https://ClinicalTrials.gov/show/NCT03463642 Completed University of Wolverhampton 2017-04-04
NCT03420378 Central Sensitization in Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT03420378 Completed Marmara University 2018-12-19
NCT01268176 The Effect of a Meal on Vitamin D Absorption https://ClinicalTrials.gov/show/NCT01268176 Completed Tufts University 2012-06-30
NCT01268111 Effect of Vitamin D Replacement on Insulin Sensitivity https://ClinicalTrials.gov/show/NCT01268111 Completed Texas Tech University Health Sciences Center 2012-03-31
NCT01250899 Vitamin D in HIV-Infected Patients on HAART https://ClinicalTrials.gov/show/NCT01250899 Completed University of California, Los Angeles 2012-06-30
NCT01244204 Role of Vitamin D in Innate Immunity to Tuberculosis https://ClinicalTrials.gov/show/NCT01244204 Completed Harvard School of Public Health 2010-05-31
NCT01240512 DAYLIGHT: Vitamin D Therapy in Individuals at High Risk of Hypertension https://ClinicalTrials.gov/show/NCT01240512 Completed Massachusetts General Hospital 2013-10-31
NCT01240265 Vitamin D Supplementation in Breastfeeding Women https://ClinicalTrials.gov/show/NCT01240265 Completed Mayo Clinic 2011-08-31
NCT01240213 Vitamin D, Diet and Activity Study https://ClinicalTrials.gov/show/NCT01240213 Completed Fred Hutchinson Cancer Research Center 2012-08-31
NCT01229878 Vitamin D Supplementation in Kidney Disease https://ClinicalTrials.gov/show/NCT01229878 Recruiting VA Office of Research and Development 2021-01-01
NCT01229189 Evaluation of the Effectiveness of Vitamin D Supplementation to Pregnant Women and Their Infants in Pakistan. https://ClinicalTrials.gov/show/NCT01229189 Completed Aga Khan University 2011-08-31
NCT01214928 Hemodialysis Vitamin D Pilot https://ClinicalTrials.gov/show/NCT01214928 Completed St. Joseph’s Healthcare Hamilton 2011-05-31
NCT01190683 Vitamin D and Muscle Strength and Surface (Electromyography) EMG https://ClinicalTrials.gov/show/NCT01190683 Completed Indian Council of Medical Research 2011-04-30
NCT01187459 Vitamin D in Pediatric Crohn’s Disease https://ClinicalTrials.gov/show/NCT01187459 Completed University of British Columbia 2012-02-29
NCT01180946 Vitamin D Deficiency in Adolescent Girls https://ClinicalTrials.gov/show/NCT01180946 Completed Massachusetts General Hospital 2013-04-30
NCT01175798 Impact of Vitamin D Repletion in Hemodialysis Patients https://ClinicalTrials.gov/show/NCT01175798 Completed Mehrotra, Anita, M.D. 2013-08-31
NCT02022475 Effect of Vitamin D Treatment on Fatigue https://ClinicalTrials.gov/show/NCT02022475 Completed University of Zurich 2015-05-31
NCT01170494 Effect of Vitamin D Oral Supplements on 25 OH Vitamin D Levels https://ClinicalTrials.gov/show/NCT01170494 Completed King Faisal Specialist Hospital & Research Center 2016-04-30
NCT01170273 Vitamin D in Vulnerable Adults (VIVA-VA) https://ClinicalTrials.gov/show/NCT01170273 Completed VA Office of Research and Development 2014-06-30
NCT01168544 Daily Vitamin D Supplementation Compared to a Loading Dose and Monthly Supplementation in Elderly Nursing Home Residents https://ClinicalTrials.gov/show/NCT01168544 Completed Rijnstate Hospital NA
NCT01166165 Effect of Vitamin D Replacement During Winter Months in Patients With Hypertension https://ClinicalTrials.gov/show/NCT01166165 Completed Regional Hospital Holstebro 2011-04-30
NCT01141972 The Role of Vitamin D in Menopause: Relationship to Menopausal Symptoms in Body Composition https://ClinicalTrials.gov/show/NCT01141972 Completed Kaiser Permanente 2012-02-29
NCT01130181 - Correction of Vitamin D Deficiency in Critically Ill Patients https://ClinicalTrials.gov/show/NCT01130181 Completed Medical University of Graz 2012-09-30
NCT01119378 Study to Observe the Capability to Absorb Calcium as an Measure of Adequate Levels of Vitamin D https://ClinicalTrials.gov/show/NCT01119378 Completed Winthrop University Hospital 2013-12-31
NCT01112891 Vitamin D in Pregnancy and Lactation https://ClinicalTrials.gov/show/NCT01112891 Completed University of British Columbia 2012-08-31
NCT01093417 Study of Vitamin D and Effect on Heart Disease and Insulin Resistance https://ClinicalTrials.gov/show/NCT01093417 Completed University Hospitals Cleveland Medical Center 2010-10-31
NCT01090206 Correlation Between Vitamin D Status and Bone Mineral Density in Patients With Hemophilia https://ClinicalTrials.gov/show/NCT01090206 Completed Virginia Commonwealth University 2013-03-31
NCT01068418 Vitamin D Supplementation Reduces Renin-Angiotensin System Activity in Obesity https://ClinicalTrials.gov/show/NCT01068418 Completed Brigham and Women’s Hospital 2011-09-30
NCT01067898 A Study on Oral Vitamin D Megadoses https://ClinicalTrials.gov/show/NCT01067898 Completed Helsinki University Central Hospital 2011-05-31
NCT01058720 Efficacy of Daily Vitamin D3 Supplementation in Normal Weight Adolescents https://ClinicalTrials.gov/show/NCT01058720 Completed Mayo Clinic 2011-01-31
NCT01050387 Effects of Vitamin D Dose and Genotype of the Binding Protein in Infants and Children https://ClinicalTrials.gov/show/NCT01050387 Completed Yale University 2013-02-28
NCT01049048 The Effect of Vitamin D Statues on Endothelial Function https://ClinicalTrials.gov/show/NCT01049048 Completed University of Wisconsin, Madison 2010-10-31
NCT01029392 Prevalence of Vitamin D Deficiency in Type 1 Diabetes Mellitus and Effect of Supplementation on Insulin Requirements https://ClinicalTrials.gov/show/NCT01029392 Completed William Beaumont Hospitals 2012-06-30
NCT01025128 Vitamin D Status in Males in Jerusalem Area and Its Correlation to Parathyroid Hormone (PTH) Level and Bone Mineral Density https://ClinicalTrials.gov/show/NCT01025128 Completed Clalit Health Services 2014-07-31
NCT01024777 Safety and Immunologic Effect of Low Dose Versus High Dose Vitamin D3 in Multiple Sclerosis https://ClinicalTrials.gov/show/NCT01024777 Completed Johns Hopkins University 2013-01-31
NCT01023490 Vitamin D Treatment to Patients Suffering From Chronic Pain and Vitamin D Hypovitaminosis https://ClinicalTrials.gov/show/NCT01023490 Completed Tel-Aviv Sourasky Medical Center 2012-10-31
NCT01016184 Influence of Vitamin D Treatment on Multi-systemic Functions in Young Men With Vitamin D Deficiency Due to Work Conditions https://ClinicalTrials.gov/show/NCT01016184 Completed Rambam Health Care Campus 2012-03-31
NCT01013584 The Effect of Weight on Vitamin D Dose Response https://ClinicalTrials.gov/show/NCT01013584 Completed Creighton University 2011-06-30
NCT01004354 Vitamin D Supplementation in Psychiatric Illnesses https://ClinicalTrials.gov/show/NCT01004354 Completed University of Massachusetts, Worcester 2010-06-30
NCT00996866 Vitamin D Supplementation Requirement in Obese Subjects https://ClinicalTrials.gov/show/NCT00996866 Completed Winthrop University Hospital 2011-06-30
NCT00968877 Vitamin D and Chronic Renal Insufficiency https://ClinicalTrials.gov/show/NCT00968877 Completed Odense University Hospital 2009-12-31
NCT00968734 Vitamin D Status After Single Oral Dose of Cholecalciferol in Low Fat Meal Compared to High-fat Meal https://ClinicalTrials.gov/show/NCT00968734 Completed Federal University of Rio Grande do Sul 2009-10-31
NCT00960232 Vitamin D, Blood Pressure, Lipids, Infection and Depression https://ClinicalTrials.gov/show/NCT00960232 Completed University of Tromso 2010-12-31
NCT00958451 Vitamin D Deficiency in Chronic Kidney Disease (CKD) Patients https://ClinicalTrials.gov/show/NCT00958451 Completed Salem Veterans Affairs Medical Center 2011-01-31
NCT00957879 Different Vitamin D Preparations & FGF23 in Humans https://ClinicalTrials.gov/show/NCT00957879 Completed Massachusetts General Hospital 2010-09-30
NCT00948298 Effect of Vitamin D3 on Vascular Function https://ClinicalTrials.gov/show/NCT00948298 Completed Charles Drew University of Medicine and Science 2011-07-31
NCT00933244 Treatment of Vitamin D Insufficiency https://ClinicalTrials.gov/show/NCT00933244 Completed University of Wisconsin, Madison 2014-08-31
NCT00921622 Vitamin Deficiency and Blood Pressure in Hospitalized Jewish General Hospital (JGH) Patients https://ClinicalTrials.gov/show/NCT00921622 Completed Jewish General Hospital 2009-10-31
NCT00909454 Vitamin D Supplement Study for Adolescents https://ClinicalTrials.gov/show/NCT00909454 Completed Augusta University 2009-03-31
NCT00893451 Study of Vitamin D3 Supplementation in Patients With Chronic Kidney Disease https://ClinicalTrials.gov/show/NCT00893451 Completed Sahlgrenska University Hospital, Sweden 2011-06-30
NCT00886379 Blue Sky Study: Impact of Milk and Vitamin D for Child Growth and Health https://ClinicalTrials.gov/show/NCT00886379 Completed Brigham and Women’s Hospital 2009-03-31
NCT00882505 Comparison of 25-hydroxy Vitamin D Level in Caucasian Women Receiving Vitamin D Supplementation and Not Receiving Supplementation: a Randomized Controlled Trial. https://ClinicalTrials.gov/show/NCT00882505 Completed Northwestern University 2010-08-31
NCT00882401 Vitamin D, Chronic Kidney Disease (CKD) and the Microcirculation https://ClinicalTrials.gov/show/NCT00882401 Completed Barts & The London NHS Trust 2010-10-31
NCT03233295 A Prospective, Single-centre, Open-label Study to Confirm the Efficacy and Safety of Vitamin D3 B.O.N. Intramuscular Injection in Adults With Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT03233295 Completed Kwang Dong Pharmaceutical co., ltd. 2016-08-27
NCT01037140 Effects of Vitamin D Supplementation in Obesity https://ClinicalTrials.gov/show/NCT01037140 Completed University of Aarhus 2011-12-31
NCT03813927 Vitamin D Treatment of Diabetic Patients With Foot Ulcers https://ClinicalTrials.gov/show/NCT03813927 Completed Zealand University Hospital 2017-12-31
NCT01503216 Safety and Bioefficacy of Vitamin D2 and Vitamin D3 https://ClinicalTrials.gov/show/NCT01503216 Completed Martin-Luther-Universität Halle-Wittenberg 2012-05-31
NCT01465178 Improving the Understanding of the Response to Vitamin D Supplementation https://ClinicalTrials.gov/show/NCT01465178 Completed University of Wisconsin, Madison 2014-12-31
NCT04005612 Effect of Vitamin d and Omega 3 on Osteocalcin https://ClinicalTrials.gov/show/NCT04005612 Active, not recruiting Applied Science Private University 2020-02-01
NCT03405207 Vitamin D Deficiency Treatment Outcomes After Non-ST-Segment Elevation Myocardial Infarction https://ClinicalTrials.gov/show/NCT03405207 Recruiting Isfahan University of Medical Sciences 2018-10-01
NCT03264625 The Effects of Oral Vitamin D Supplementation on the Prevention of Peritoneal Dialysis-related Peritonitis https://ClinicalTrials.gov/show/NCT03264625 Recruiting Peking University First Hospital 2020-09-30
NCT02158598 Comparison of Changes in Serum 25(OH)D Concentrations Following Vitamin D Supplementation With Chewable Tablets Versus Pills https://ClinicalTrials.gov/show/NCT02158598 Completed CHU de Quebec-Universite Laval 2017-12-31
NCT01512537 Alternative Treatments of Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT01512537 Completed Lund University 2011-04-30
NCT03609970 Vitamin D and Immunity: Photosynthesis Versus Supplementation https://ClinicalTrials.gov/show/NCT03609970 Completed Guy’s and St Thomas’ NHS Foundation Trust 2017-04-14
NCT03490448 The Changes of Body Composition, Glucolipid Metabolism and Bone Metabolism in Obese Children After Weight Loss https://ClinicalTrials.gov/show/NCT03490448 Completed Xinhua Hospital, Shanghai Jiao Tong University School of Medicine 2014-08-16
NCT03437421 Myocardial Function and Vitamin D Supplementation in Diabetes. https://ClinicalTrials.gov/show/NCT03437421 Recruiting University of Avignon 2020-12-31
NCT00789503 Nursing-Home Residents Given Bread Fortified With Vitamin D3 https://ClinicalTrials.gov/show/NCT00789503 Completed University of Toronto 2005-12-31
NCT00752102 Vitamin D and Coronary Calcification Study https://ClinicalTrials.gov/show/NCT00752102 Completed Joslin Diabetes Center 2013-10-31
NCT00749918 Effect of Vitamin D Deficiency and Vitamin D Supplementation on Glucose Metabolism https://ClinicalTrials.gov/show/NCT00749918 Completed University of Minnesota 2008-06-30
NCT00743574 Health Benefits of Vitamin D and Calcium in Women With PCOS (Polycystic Ovarian Syndrome) https://ClinicalTrials.gov/show/NCT00743574 Completed Yale University 2013-02-28
NCT00742235 hCAP18 Levels and Vitamin D Deficiency in Healthy Subjects https://ClinicalTrials.gov/show/NCT00742235 Completed Massachusetts General Hospital 2012-01-31
NCT00736632 Vitamin D, Insulin Resistance, and Cardiovascular Disease https://ClinicalTrials.gov/show/NCT00736632 Completed Washington University School of Medicine 2019-01-13
NCT00723385 Effects of Vitamin D on Lipids https://ClinicalTrials.gov/show/NCT00723385 Completed University of California, San Francisco 2012-07-31
NCT00697294 Impact of Vitamin D Status on Bones in Breastfed Infants https://ClinicalTrials.gov/show/NCT00697294 Completed Baylor College of Medicine 2011-07-31
NCT00692120 Clinical Approaches to Correcting Vitamin D Inadequacy and Maintaining Adequacy https://ClinicalTrials.gov/show/NCT00692120 Completed University of Wisconsin, Madison 2008-11-30
NCT00690417 Vitamin D Inadequacy in Rural Populations, Evaluation of Correction by Food Supplementation https://ClinicalTrials.gov/show/NCT00690417 Completed University of Wisconsin, Madison 2011-08-31
NCT00685971 Cholecalciferol for Vitamin D in Adult Cystic Fibrosis (CF) Patients https://ClinicalTrials.gov/show/NCT00685971 Completed St. Michael’s Hospital, Toronto 2013-07-31
NCT00682214 Cholecalciferol Supplementation, Muscle Strength https://ClinicalTrials.gov/show/NCT00682214 Completed Indian Council of Medical Research 2008-11-30
NCT00674154 Effect of Vitamin D Treatment in Primary Hyperparathyroidism https://ClinicalTrials.gov/show/NCT00674154 Completed University of Aarhus 2013-08-31
NCT00662844 Vitamin D Supplementation in Younger Women https://ClinicalTrials.gov/show/NCT00662844 Completed Creighton University 2011-08-31
NCT00610688 Controlled Trial of Prenatal Vitamin D3 Supplementation to Prevent Vitamin D Deficiency in Mothers and Their Infants https://ClinicalTrials.gov/show/NCT00610688 Completed Children’s Hospital Medical Center, Cincinnati 2011-06-30
NCT00581828 Does Treatment of Hypovitaminosis D Increase Calcium Absorption? https://ClinicalTrials.gov/show/NCT00581828 Completed University of Wisconsin, Madison 2008-07-31
NCT00497900 The Effect of Calcium and Vitamin D in Patients With Heart Failure https://ClinicalTrials.gov/show/NCT00497900 Completed Hvidovre University Hospital 2011-09-30
NCT00494104 Prevention of Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT00494104 Completed Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) 2011-09-30
NCT00491322 Vitamin D Deficiency, Insulin Resistance and FGF-23 https://ClinicalTrials.gov/show/NCT00491322 Completed Massachusetts General Hospital 2008-02-29
NCT00473317 Sunlight Exposures Effect on Serum Vitamin D Levels https://ClinicalTrials.gov/show/NCT00473317 Completed Creighton University 2007-09-30
NCT00473239 The Pharmacokinetics of a Single Large Dose of Vitamin D3 https://ClinicalTrials.gov/show/NCT00473239 Completed Creighton University 2007-03-31
NCT00427037 Cholecalciferol (Vitamin D3) Therapy in Chronic Kidney Disease (CKD) Subjects https://ClinicalTrials.gov/show/NCT00427037 Completed Atlanta VA Medical Center 2006-07-31
NCT00423358 Treatment of Hypovitaminosis D in Rheumatoid Arthritis https://ClinicalTrials.gov/show/NCT00423358 Completed University of Wisconsin, Madison 2008-08-31
NCT00416715 Vitamin D Deficiency, Muscle Pain, Joint Pain, and Joint Stiffness in Postmenopausal Women Receiving Letrozole For Stage I-III Breast Cancer https://ClinicalTrials.gov/show/NCT00416715 Completed University of Washington 2010-05-31
NCT00415402 Effect of Vitamin D Supplementation on Health of Low Birth Weight Infants https://ClinicalTrials.gov/show/NCT00415402 Completed Delhi University 2010-07-31
NCT00412087 Vitamin D Status of Pregnant Women and Their Children in Eau Claire, South Carolina https://ClinicalTrials.gov/show/NCT00412087 Completed Medical University of South Carolina 2009-07-31
NCT00412074 Establishing the Vitamin D Requirements During Lactation https://ClinicalTrials.gov/show/NCT00412074 Completed Medical University of South Carolina 2012-10-31
NCT00381914 Vitamin D Dose-Response Study to Establish Dietary Requirements in Infants https://ClinicalTrials.gov/show/NCT00381914 Completed McGill University 2011-09-30
NCT00327847 Optimizing Vitamin D Nutrition in Healthy Adults https://ClinicalTrials.gov/show/NCT00327847 Completed Winthrop University Hospital 2006-12-31
NCT00292591 Evaluation of Vitamin D Requirements During Pregnancy https://ClinicalTrials.gov/show/NCT00292591 Completed Medical University of South Carolina 2010-01-31
NCT00288873 Characterization of Hyperparathyroidism and Vitamin D Deficiency in Obesity https://ClinicalTrials.gov/show/NCT00288873 Completed Weill Medical College of Cornell University 2007-07-31
NCT00273611 Vitamin D Levels and Vitamin D Education in Geriatric Patients https://ClinicalTrials.gov/show/NCT00273611 Completed University of Colorado, Denver 2006-05-31
NCT00267540 The Effect of Vitamin D on Bone Accretion and Turn-Over in Young Girls https://ClinicalTrials.gov/show/NCT00267540 Completed University of Copenhagen NA
NCT00242476 A Study to Assess the Effectiveness of an Investigational Drug in Elderly Subjects With Low Vitamin D Levels (0822A-009) https://ClinicalTrials.gov/show/NCT00242476 Completed Merck Sharp & Dohme Corp. 2006-07-31
NCT00235586 Vitamin D Deficiency: Bone Loss and Vascular Dysfunction https://ClinicalTrials.gov/show/NCT00235586 Completed University of Kansas Medical Center NA
NCT00204919 Vitamin D Administration in the Nursing Home https://ClinicalTrials.gov/show/NCT00204919 Completed University of Wisconsin, Madison 2004-05-31
NCT00204906 Correction of Vitamin D Inadequacy in Nursing Home Residents https://ClinicalTrials.gov/show/NCT00204906 Completed University of Wisconsin, Madison 2009-01-31
NCT00092079 A Study of MK0217A and Dietary Supplement in Men and Postmenopausal Women With Osteoporosis (0217A-227) https://ClinicalTrials.gov/show/NCT00092079 Completed Merck Sharp & Dohme Corp. 2004-11-30
NCT00092066 A Study to Evaluate the Safety, Tolerability, and Efficacy of an Investigational Drug and Dietary Supplement in Men and Postmenopausal Women With Osteoporosis (0217A-227) https://ClinicalTrials.gov/show/NCT00092066 Completed Merck Sharp & Dohme Corp. 2004-05-01
NCT00681590 Safety of Vitamin D Supplementation in Older Persons https://ClinicalTrials.gov/show/NCT00681590 Completed University of Miami 2009-04-30

Observational Studiess

#If less then 500 studies

nct_id brief_title link overall_status source primary_completion_date
NCT03381378 Vitamin D and Hand Grip Strength at 5 Years in Odense Child Cohort https://ClinicalTrials.gov/show/NCT03381378 Completed Odense University Hospital 2017-06-30
NCT03376490 Study of the Association of Muscle Strength, Balance and Other Factors With Vitamin Levels Among Elderly Diabetics https://ClinicalTrials.gov/show/NCT03376490 Completed SingHealth Polyclinics 2014-08-31
NCT03820895 Vitamin D Levels in Adolescent Idiopathic Scoliosis https://ClinicalTrials.gov/show/NCT03820895 Completed Security Forces Hospital 2018-08-20
NCT03305510 Vitamin D Deficiency of Couples and Infertility https://ClinicalTrials.gov/show/NCT03305510 Completed Tongji Hospital 2017-03-01
NCT03304795 Vitamin D Deficiency Still Growing https://ClinicalTrials.gov/show/NCT03304795 Completed DongGuk University 2014-12-31
NCT03284840 Adults Nutrition as a Protective or Health-risk Factor https://ClinicalTrials.gov/show/NCT03284840 Active, not recruiting Nutrition Institute, Slovenia 2018-09-13
NCT03273725 Maternal Vitamin D Levels in Pregnancy and Dental Caries in Children https://ClinicalTrials.gov/show/NCT03273725 Completed Tannhelsetjenestens Kompetansesenter Midt-Norge 2017-08-31
NCT03234218 Vitamin D Levels in Liver Transplantation Recipients Prospective Observational Study https://ClinicalTrials.gov/show/NCT03234218 Completed The Mediterranean Institute for Transplantation and Advanced Specialized Therapies 2017-09-30
NCT03221972 Vitamin D of Chinese Children and Adolescents https://ClinicalTrials.gov/show/NCT03221972 Completed Centers for Disease Control and Prevention, China 2013-12-30
NCT03203382 Corneal Nerve Structure in Sjogren’s https://ClinicalTrials.gov/show/NCT03203382 Completed University of Pennsylvania 2017-04-30
NCT03073720 Follicular Fluid, Bioavailable Vitamin D and Embryo Quality Markers https://ClinicalTrials.gov/show/NCT03073720 Completed IVI Middle East Fertility Clinic 2019-07-30
NCT03021629 Comparison of Vitamin D Status and Vitamin D Receptor Polymorphisms in Patients With High Myopia and Primary Open-angle Glaucoma https://ClinicalTrials.gov/show/NCT03021629 Completed Tianjin Medical University Eye Hospital 2016-12-31
NCT02906319 Vitamin D and HbA1c Levels in Diabetic Patients With CKD https://ClinicalTrials.gov/show/NCT02906319 Completed University of Malaya 2016-07-31
NCT02904720 Prevalence and Consequences of Vitamin D Deficiency in Pregnant Women in Switzerland https://ClinicalTrials.gov/show/NCT02904720 Completed University Hospital Inselspital, Berne 2016-02-29
NCT02539745 Associations of Vitamin D Deficiency and Vitamin D Receptor Polymorphisms With the Risk of Primary Open-angle Glaucoma https://ClinicalTrials.gov/show/NCT02539745 Completed Tianjin Medical University Eye Hospital 2014-12-31
NCT02534714 Analysis of Hypovitaminosis D and Osteopenia/Osteoporosis in Spinal Disease Patients Who Underwent a Spinal Fusion at Illinois Neurological Institute, Peoria, IL., a Retrospective Review From November 1, 2012 to October 31, 2014 and Prospective Pilot From July 1, 2015-June 30, 2016 https://ClinicalTrials.gov/show/NCT02534714 Completed OSF Healthcare System 2017-06-30
NCT02438488 Vitamin D and Mortality: an Individual Participant Data Meta-analysis of Standardized 25-hydroxyvitamin D https://ClinicalTrials.gov/show/NCT02438488 Completed Medical University of Graz 2015-09-30
NCT02416895 Vitamin D Status and Immune Function https://ClinicalTrials.gov/show/NCT02416895 Completed Bangor University 2015-12-31
NCT02301520 Vitamin D, Iodine, and Lead Levels in Haitian Infants and Children. https://ClinicalTrials.gov/show/NCT02301520 Completed Boston Children’s Hospital 2015-06-30
NCT02295228 Hip Arthroplasty and Vitamin D Status https://ClinicalTrials.gov/show/NCT02295228 Completed University of Wisconsin, Madison 2015-11-30
NCT02281162 The Influence of Vitamin D on Atypical Antipsychotic-induced Weight Gain https://ClinicalTrials.gov/show/NCT02281162 Completed Creighton University 2015-09-30
NCT02258035 Isolation of Vitamin D Binding Protein Isoforms From Human Volunteers https://ClinicalTrials.gov/show/NCT02258035 Active, not recruiting Universitaire Ziekenhuizen Leuven 2016-12-31
NCT02250625 Study Vitamin D in Healthy Individuals https://ClinicalTrials.gov/show/NCT02250625 Completed Fujirebio Diagnostics, Inc. 2015-04-30
NCT02190396 Vitamin D Deficiency and Placental Calcification in Low-risk Obstetric Population - Are They Related? https://ClinicalTrials.gov/show/NCT02190396 Completed Zekai Tahir Burak Women’s Health Research and Education Hospital 2014-05-31
NCT02187146 The Effects of Serum Vitamin D and IVF Outcome https://ClinicalTrials.gov/show/NCT02187146 Completed University of Birmingham 2014-12-31
NCT01999608 Vitamin D Deficiency and Ovarian Reserve Among Infertile Patients https://ClinicalTrials.gov/show/NCT01999608 Completed Universitair Ziekenhuis Brussel 2014-06-30
NCT01985672 Vitamin D Deficiency and Pregnancy Rates in Women Undergoing Frozen Embryo Transfer https://ClinicalTrials.gov/show/NCT01985672 Completed Universitair Ziekenhuis Brussel 2014-06-30
NCT01971411 Vitamin D Deficiency in Elderly African American Women in Central Texas https://ClinicalTrials.gov/show/NCT01971411 Completed McLennan County Medical Education and Research Foundation 2007-05-31
NCT01926808 Vitamin D Serum Concentrations & Supplementation in Children With Cerebral Palsy https://ClinicalTrials.gov/show/NCT01926808 Completed Akron Children’s Hospital 2015-12-31
NCT01817231 Epidemiological Analysis of Vitamin D and Breast Cancer Risk in Saudi Arabian Women https://ClinicalTrials.gov/show/NCT01817231 Completed University of Arizona 2009-08-31
NCT01816711 Vitamin D Levels in Frail Elderly Patients With a Hip Fracture https://ClinicalTrials.gov/show/NCT01816711 Completed University of Aarhus 2012-09-30
NCT01793181 Vitamin D Levels in Patients With Central Retinal Vein Occlusion- a Prospective Controlled Study https://ClinicalTrials.gov/show/NCT01793181 Completed St. Erik Eye Hospital 2014-08-31
NCT01705522 Multimodal Approach in IBD Patients https://ClinicalTrials.gov/show/NCT01705522 Recruiting Clinical Hospital Colentina 2019-09-30
NCT01696409 The Effect Of Vitamin D On Measures Of Bone Health And Gene Expression https://ClinicalTrials.gov/show/NCT01696409 Completed Boston University 2012-06-30
NCT03349879 Familial Clustering of Vitamin D Deficiency Via Shared Environment: The Korean National Health And Nutrition Examination Survey 2008-2012 https://ClinicalTrials.gov/show/NCT03349879 Completed Yonsei University 2012-12-31
NCT01634607 Bone Health and Vitamin D Status https://ClinicalTrials.gov/show/NCT01634607 Enrolling by invitation Thai Red Cross AIDS Research Centre 2020-10-31
NCT01589783 Vitamin D During Pregnancy https://ClinicalTrials.gov/show/NCT01589783 Completed Hadassah Medical Organization 2014-06-30
NCT01553344 Serum Sclerostin Level & Treatment of Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT01553344 Completed Bagcilar Training and Research Hospital 2013-04-30
NCT01548716 A Study of 25-hydroxy Vitamin d Levels in Non-itching Hemodialysis Patients https://ClinicalTrials.gov/show/NCT01548716 Completed Winthrop University Hospital 2011-10-31
NCT02024490 The Effect of Maternal and Neonatal Vitamin D Levels on Respiratory Distress Syndrome in Preterm Infants https://ClinicalTrials.gov/show/NCT02024490 Completed Kanuni Sultan Suleyman Training and Research Hospital 2013-12-31
NCT01432678 Vitamin D Status in Pediatric Asthma https://ClinicalTrials.gov/show/NCT01432678 Completed Mahidol University 2013-06-30
NCT01420315 The Prevalence of Vitamin D Deficiency in Patients With Alzheimer’s Disease https://ClinicalTrials.gov/show/NCT01420315 Completed Saglik Bilimleri Universitesi Gulhane Tip Fakultesi 2012-08-31
NCT01413230 Vitamin D Supplementation in Systemic Lupus Erythematosus https://ClinicalTrials.gov/show/NCT01413230 Completed Assistance Publique - Hôpitaux de Paris 2011-01-31
NCT01410305 Vitamin D and HIV-Cardiovascular Disease in Children and Young Adults https://ClinicalTrials.gov/show/NCT01410305 Completed University Hospitals Cleveland Medical Center 2014-12-31
NCT01397383 Vitamin D and Functional Outcomes After Total Hip Arthroplasty (THA) https://ClinicalTrials.gov/show/NCT01397383 Completed Hospital for Special Surgery, New York 2011-06-30
NCT01328704 Evaluate the Change in Iron, Vitamin D, and C-Reactive Protein Level (CRP) in a 12 to 24 Week Period https://ClinicalTrials.gov/show/NCT01328704 Completed Avera McKennan Hospital & University Health Center 2013-03-31
NCT04407572 Evaluation of the Relationship Between Zinc Vitamin D and b12 Levels in the Covid-19 Positive Pregnant Women https://ClinicalTrials.gov/show/NCT04407572 Completed Kanuni Sultan Suleyman Training and Research Hospital 2020-06-01
NCT04404842 Development of a Screening Tool for the Risk of Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT04404842 Recruiting University of Pavia 2022-01-31
NCT04403932 Increased Risk of Severe Coronavirus Disease 2019 in Patients With Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT04403932 Recruiting Hospital San Carlos, Madrid 2020-06-01
NCT04389424 Relationship Between Body Composition, Food Consumption, and Micro and Macronutrients With Gene Expression in Breast Cancer https://ClinicalTrials.gov/show/NCT04389424 Recruiting Instituto Jalisciense de Cancerologia 2020-05-15
NCT04324853 Helminth Infection During Pregnancy on Vitamin D Regulation: HELMVIT Study https://ClinicalTrials.gov/show/NCT04324853 Recruiting Centre de Recherche Médicale de Lambaréné 2020-12-31
NCT04209231 Effect of Vitamin D on Periodontal Disease https://ClinicalTrials.gov/show/NCT04209231 Completed Recep Tayyip Erdogan University Training and Research Hospital 2016-04-30
NCT04066842 Vitamin D in Systemic Sclerosis Patients With Periodontitis https://ClinicalTrials.gov/show/NCT04066842 Completed University of Messina 2019-05-15
NCT04030182 Vitamin D Deficit in Women With Uterine Fibroids https://ClinicalTrials.gov/show/NCT04030182 Recruiting Instituto Mexicano del Seguro Social 2020-10-30
NCT03991078 Effect of Vitamin D on the Size of Fibroids in Women With Vitamin D Deficiency https://ClinicalTrials.gov/show/NCT03991078 Recruiting Fundación IVI 2020-06-25
NCT03894735 Vitamin D in Ectopic Pregnancies https://ClinicalTrials.gov/show/NCT03894735 Completed Kanuni Sultan Suleyman Training and Research Hospital 2017-06-01
NCT03882099 Vitamin D Level and Its Relation to Pre-eclampsia and Eclampsia https://ClinicalTrials.gov/show/NCT03882099 Recruiting Cairo University 2019-09-17
NCT03873935 Vitamin D in Periodontal and Cardiovascular Disease Progression https://ClinicalTrials.gov/show/NCT03873935 Completed University of Messina 2018-01-05
NCT03829943 Vitamin D and Human Sperm DNA Fragmentation https://ClinicalTrials.gov/show/NCT03829943 Recruiting Sanford Health 2020-02-29
NCT03683238 Nutritional Status and Hidradenitis Suppurativa (Acne Inversa) https://ClinicalTrials.gov/show/NCT03683238 Completed Federico II University 2018-04-30
NCT03665974 The Relation Between Vitamin D and Gestational Diabetes Mellitus https://ClinicalTrials.gov/show/NCT03665974 Completed Hacettepe University 2013-08-05
NCT03639584 Prevalence of Deficiency of Vitamin D in Critically Ill Patients https://ClinicalTrials.gov/show/NCT03639584 Recruiting National Taiwan University Hospital 2020-10-31
NCT03638037 Correlation Between Maternal Vitamin D Level And Preterm Birth https://ClinicalTrials.gov/show/NCT03638037 Recruiting Ain Shams Maternity Hospital 2019-03-31
NCT03584256 Vitamin D Status Among Competitive Female Gymnast and Swimmers After Winter Time https://ClinicalTrials.gov/show/NCT03584256 Completed University of Ljubljana 2018-04-06
NCT03471481 Magnesium as a Mediator of Bone and Vitamin D Metabolism in Patients on Antiepileptic Drug Therapy https://ClinicalTrials.gov/show/NCT03471481 Recruiting Drexel University 2020-08-10
NCT01208636 Environmental & Genetic Influences on Vitamin D Status https://ClinicalTrials.gov/show/NCT01208636 Completed Creighton University 2010-08-31
NCT03871868 Vitamin D Levels And Myoma Uteri https://ClinicalTrials.gov/show/NCT03871868 Completed Kanuni Sultan Suleyman Training and Research Hospital 2019-03-01
NCT01118806 Vitamin D Levels in Residents in Medicine https://ClinicalTrials.gov/show/NCT01118806 Completed Meir Medical Center 2011-11-30
NCT01105689 Utility of a Urine Screening Tool for Vitamin D Deficiency in Infants and Toddlers https://ClinicalTrials.gov/show/NCT01105689 Completed Nemours Children’s Clinic 2011-07-31
NCT00887666 Pilot Study: Hypovitaminosis D, Hyperparathyroidism and Hypomagnesemia in Patients With Congestive Heart Failure https://ClinicalTrials.gov/show/NCT00887666 Completed State University of New York - Downstate Medical Center 2008-10-31
NCT00851396 Assessment of Influence of Vitamin D on Insulin Secretion and Sensitivity in Obese Teenage Girls https://ClinicalTrials.gov/show/NCT00851396 Completed University of Alabama at Birmingham 2010-10-31
NCT00850694 Vitamin D Deficiency in Obese Adolescent Girls and Influence of Vitamin D on Insulin Secretion and Sensitivity https://ClinicalTrials.gov/show/NCT00850694 Completed University of Alabama at Birmingham 2010-10-31
NCT03483584 Incidence of HANA Conditions in HIV-infected Individuals https://ClinicalTrials.gov/show/NCT03483584 Recruiting Chinese University of Hong Kong 2022-01-31
NCT03253055 The D-BIICEP Study https://ClinicalTrials.gov/show/NCT03253055 Completed University of Surrey 2018-07-01
NCT01793402 Vitamin D Status and the Adequacy of Vitamin D Intake in Early Preterm Infants https://ClinicalTrials.gov/show/NCT01793402 Completed Children’s Hospital Medical Center, Cincinnati 2012-05-31
NCT00780247 Environmental Influences on Vitamin D Status https://ClinicalTrials.gov/show/NCT00780247 Completed Creighton University 2008-08-31
NCT00756899 Vitamin D Deficiency and Low Bone Mineral Content in Children https://ClinicalTrials.gov/show/NCT00756899 Completed University of Massachusetts, Worcester 2012-05-31
NCT00749541 Vitamin d Levels and Coronary Catheterization https://ClinicalTrials.gov/show/NCT00749541 Completed Assaf-Harofeh Medical Center 2009-08-31
NCT00695474 Vitamin D and Type 2 Diabetes - a Cross Sectional Study https://ClinicalTrials.gov/show/NCT00695474 Completed University of Aarhus 2009-04-30

Registries

#If less then 500 registries

nct_id brief_title link overall_status source primary_completion_date
NCT03344718 Metabolic Syndrome and Vitamin D Level in Old People https://ClinicalTrials.gov/show/NCT03344718 Completed National Cheng-Kung University Hospital 2012-08-17
NCT03330301 D-tecting Disease - From Exposure to Vitamin D During Critical Periods of Life https://ClinicalTrials.gov/show/NCT03330301 Completed Bispebjerg Hospital 2016-09-30
NCT02351284 Impact of Hypovitaminosis D on Bone Disease in HIV Infected Patients https://ClinicalTrials.gov/show/NCT02351284 Recruiting Asociacion para el Estudio de las Enfermedades Infecciosas 2020-07-31
NCT02019836 Comparison of Maternal and Neonatal Vitamin D Levels in Term Neonates With and Without Early Onset Sepsis https://ClinicalTrials.gov/show/NCT02019836 Completed Kanuni Sultan Suleyman Training and Research Hospital 2013-01-31
NCT01799655 Does Vitamin D Deficiency Associated With Hypercoagulability & Increased Thrombin Generation? https://ClinicalTrials.gov/show/NCT01799655 Completed HaEmek Medical Center, Israel 2014-04-30
NCT04405141 Uroflowmetry Results and Vitamin D Levels https://ClinicalTrials.gov/show/NCT04405141 Completed Umraniye Education and Research Hospital 2017-12-30
NCT03734250 D Vitamin Effects on Neuromuscular Blocker Reverse Time https://ClinicalTrials.gov/show/NCT03734250 Completed Duzce University 2018-03-01
NCT03652987 Endocrine and Menstrual Disturbances in Women With Polycystic Ovary Syndrome (PCOS) https://ClinicalTrials.gov/show/NCT03652987 Recruiting St George’s, University of London 2019-11-30